Dhamnekar Win,odd Posted March 6, 2023 Posted March 6, 2023 (edited) My answers: 1. - n (n-1) [imath] -\displaystye\frac{n(n-1)(n-2)}{27}[/imath] 2. Edited March 6, 2023 by Dhamnekar Win,odd Latex not working
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